 //package com.itheima.reggie.filter;
//
//import com.alibaba.fastjson.JSON;
//import com.itheima.reggie.common.R;
//import lombok.extern.slf4j.Slf4j;
//
//import javax.servlet.FilterChain;
//import javax.servlet.ServletException;
//import javax.servlet.ServletRequest;
//import javax.servlet.ServletResponse;
//import javax.servlet.annotation.WebFilter;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpSession;
//import java.io.IOException;
//import java.util.logging.Filter;
//import java.util.logging.LogRecord;
//
//@WebFilter("/*")
//@Slf4j
//public class LoginCheckFilter implements Filter {
//    @Override
//    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
//        log.info("过滤器");
//        HttpServletRequest req = (HttpServletRequest) servletRequest;
//        String pathes[] = {
//                "/employee/login",
//                "/employee/logout",
//                "/backend",
//                "/front"
//        };
//        String s = req.getRequestURL().toString();
//        for (String path : pathes) {
//            if (s.contains(path)) {
//                filterChain.doFilter(servletRequest, servletResponse);
//                return;
//            }
//        }
//        HttpSession session = req.getSession();
//        Object emp = session.getAttribute("emp");
//        if(emp!=null){
//            filterChain.doFilter(servletRequest,servletResponse);
//            return;
//        }
//        servletResponse.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
//    }
//
//    @Override
//    public boolean isLoggable(LogRecord record) {
//        return false;
//    }
//}
//


package com.itheima.reggie.filter;

        import com.alibaba.fastjson.JSON;
        import com.itheima.reggie.common.BaseContext;
        import com.itheima.reggie.common.R;
        import lombok.extern.slf4j.Slf4j;
        import org.springframework.boot.web.servlet.ServletComponentScan;
        import org.springframework.util.AntPathMatcher;

        import javax.servlet.*;
        import javax.servlet.annotation.WebFilter;
        import javax.servlet.http.HttpServletRequest;
        import javax.servlet.http.HttpServletResponse;
        import java.io.IOException;

/**
 * 检查用户是否已经完成登录
 */
@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")

@Slf4j
public class LoginCheckFilter implements Filter{
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        //1、获取本次请求的URI
        String requestURI = request.getRequestURI();// /backend/index.html

        log.info("拦截到请求：{}",requestURI);

        //定义不需要处理的请求路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/login",
                "/user/sendMsg"
        };


        //2、判断本次请求是否需要处理
        boolean check = check(urls, requestURI);

        //3、如果不需要处理，则直接放行
        if(check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }

        //4、判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("employee") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employee"));

            BaseContext.setCurrentId((Long) request.getSession().getAttribute("employee"));
            filterChain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("user") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //5、如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }

    /**
     * 路径匹配，检查本次请求是否需要放行
     * @param urls
     * @param requestURI
     * @return
     */
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}
